Bosch W11P, W14P, W18P User Manual

Installation and Operating Instructions

Gas Instantaneous Water Heater

Safety instructions:

If you smell gas:

- Do not operate any electrical switches.

6 720 607 526 ZA (05.02) JS

- Do not telephone from inside the danger area.

- Turn off the gas cock.

- Open windows and ventilate room.

- From outside, call the gas company and your approved
installer.

Do not use or store easily combustible materials in the vicinity
of the appliance.

W11..P...
W14..P...
W18..P...

With piezo ignition and double safety
system consisting of flue gas monitor and
heat exchanger temperature sensor.

Installation and servicing of the appliance may only be
carried out by an approved technician.

The appliance should be regularly serviced in order to ensure
that it remains in perfect and safe working order.

If there is a risk of freezing, the appliance must be switched
off and drained. If the appliance has not been drained during
a cold spell, when it is switched on again check that it
produces hot water. If problems occur, contact your installer.

page page

W 11 P

23
31

S…

W 14 P

23
31

S…

W 18 P

23
31

S…

1. Technical Characteristics and Dimensions ............... 2

1.1 General description ..........................................................2

1.2 Explanation of model code ..............................................2

1.3 Accessories ........................................................................ 2

1.4 Dimensions ......................................................................... 3

1.5 Appliance design ............................................................... 3

1.6 Technical characteristics ................................................. 4

2. Preconditions for installation ........................................... 5

2.1 Regulations .........................................................................5

2.2 Location .............................................................................. 5

2.3 Fixing the appliance.......................................................... 5

2.4 Water connection ............................................................. 5

Index

2.5 Gas connection ................................................................. 5

2.6 Flue....................................................................................... 5

2.7 Comissioning ...................................................................... 5

3. Operation and maintenance ............................................. 6

3.1 Function .............................................................................. 6

3.2 Water temperature control .............................................. 6

3.3 Appliance adjustments ..................................................... 6

3.4 Maintenance ...................................................................... 6

3.5 Flue gas safety device ..................................................... 6

3.6 Converting to a different gas type ................................6

3.7 Troubleshooting ................................................................. 7

4. Operation .................................................................................. 8

1. Technical Characteristics and Dimensions

1.1 General Description

This water heater is fitted with a piezo system.
Guaranteed safety provided by:

- Gas-tight ionisation detector that prevents escape of gas
if there is no flame.

- Flue gas safety device that switches off the appliance if
the flue is not functioning properly.

- Temperature limiter which protects the heat exchanger
against overheating.

Heat exchanger has no tin/lead lining.
Automatic water valve made of glass-fibre reinforced
polyamide, 100% recyclable.
Automatic control of water flow maintains constant flow rate
even with fluctuating supply pressure.
Gas valve with adjustable output via a slide control.

1.2 Explanation of Model Code

W Gas instantaneous water heater

11 Flow rate (l/min)

P Piezo ignition

23 Natural gas type H

31 LPG (butane/propane)

S... Country code

1.3 Accessories (Included with Appliance)

- Sleeves and hooks for wall-mounting

2 6 720 607 526

1.4 Dimensions

Dimensions

A B C D E F G H (Ø)

(mm) Natural Gas LPG

W11..P...

310 580 228 112,5 463 60 25

W14..P...

350 655 228 132,5 510 95 30

W18..P...

425 655 334 132,5 540 65 30

1/2"

1. Front cover

2. Hole for fixing to wall

3. Observation window

4. Temperature control

5. Output control

6. Gas connection

7. Exhaust pipe union

8. Draught diverter with flue gas
monitor

9. Heat exchanger

10. Automatic gas valve

11. Piezo

12. Water valve

1.5 Appliance design

Fig. 2

1. Heat exchanger

2. Main burner

3. Injector

4. Slow ignition valve

5. Temperature control

6. Venturi

7. Water valve

8. Water throttle

9. Water filter

10. Membrane

11. Cold water pipe

12. Magnetic valve

13. Gas supply pipe

14. Gas filter

15. Regulating screw

16. Pilot filter

17. Piezo

18. Hot water pipe

19. Output control

20. Igniter button

21. Main gas valve

22. Gas valve for pilot burner

23. Pilot burner injector

24. Gas valve

25. Jet pressure testing point

26. Thermocouple

27. Igniter electrode

28. Temperature limiter

29. Flue gas safety device

Fig. 3

36 720 607 526